The ultrastructure and RNA metabolism of nucleoli in early sea urchin embryos.
D001345:Autoradiography; D002466:Cell Nucleolus / Q000254:growth & development* / Q000378:metabolism; D004447:Echinodermata / Q000378:metabolism*; D004625:Embryo, Nonmammalian / Q000378:metabolism*; D008853:Microscopy; D008854:Microscopy, Electron; D012313:RNA / Q000096:biosynthesis*; D014316:Tritium; D014529:Uridine / Q000378:metabolism
D014316:Tritium; D012313:RNA; D014529:Uridine